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Effect of varying frontal systems on stable oxygen and carbon isotopic compositions of modern planktic foraminifera of Southern Ocean

DRS at CSIR-National Institute of Oceanography

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Title Effect of varying frontal systems on stable oxygen and carbon isotopic compositions of modern planktic foraminifera of Southern Ocean
 
Creator Tiwari, M.
Mohan, R.
Meloth, T.
Naik, S.S.
Sudhakar, M.
 
Subject frontal systems
foraminifera
sediments
water-masses
 
Description Studies have been carried out in the Atlantic and Pacific sectors of the Southern Ocean regarding the movement of its fronts (water-masses boundaries) with changing climate and other oceanic parameters. But the Indian sector of the Southern Ocean has received little attention. To fill in this lacuna, during the first Indian expedition to Southern Ocean in 2004, plankton net samples, sediment cores and other physical oceanographic parameters were collected. The isotopic results obtained from planktic foraminifera from the plankton net samples and surface sediments are presented here. We find that, in this region too, planktic foraminifera secrete their shells in isotopic equilibrium with seawater and the planktic foraminifera from the core top sediments yield values akin to that obtained from plankton net samples. It implies that planktic foraminifera preserved in sediments record overlying seawater signatures in this sector. Thus, down-core foraminiferal isotopic data from the Indian sector of the Southern Ocean can be used as a proxy for reconstructing the temporal variations of different water masses
 
Date 2011-03-30T06:01:07Z
2011-03-30T06:01:07Z
2011
 
Type Journal Article
 
Identifier Current Science, vol.100(6); 2011; 881-887
http://drs.nio.org/drs/handle/2264/3831
 
Language en
 
Rights Copyright [2011]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Current Science Association